nari/shell.html at main · nari-lang/nari · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Nari Interpreter</title>
  <style>
  body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 20px;
  background: #1e1e1e;
  color: #d4d4d4;
  }
  h1 {
  color: #4ec9b0;
  margin-bottom: 10px;
  }
  .container {
  max-width: 1200px;
  margin: 0 auto;
  }
  .panel {
  background: #252526;
  border: 1px solid #3c3c3c;
  border-radius: 4px;
  padding: 15px;
  margin-bottom: 15px;
  }
  textarea, pre {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 14px;
  width: 100%;
  box-sizing: border-box;
  }
  #code-input {
  background: #1e1e1e;
  color: #d4d4d4;
  border: 1px solid #3c3c3c;
  padding: 10px;
  min-height: 200px;
  resize: vertical;
  border-radius: 4px;
  }
  #output {
  background: #1e1e1e;
  color: #cccccc;
  padding: 10px;
  min-height: 300px;
  max-height: 500px;
  overflow-y: auto;
  border: 1px solid #3c3c3c;
  border-radius: 4px;
  white-space: pre-wrap;
  word-wrap: break-word;
  }
  button {
  background: #0e639c;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  margin-right: 10px;
  }
  button:hover {
  background: #1177bb;
  }
  button:disabled {
  background: #3c3c3c;
  cursor: not-allowed;
  }
  .status {
  padding: 8px 12px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
  }
  .status.loading  { background: #1e3a5f; color: #4ec9b0; }
  .status.ready  { background: #1e3a1e; color: #4ec9b0; }
  .status.running  { background: #3a3a1e; color: #dcdcaa; }
  .status.error  { background: #4a1e1e; color: #f48771; }
  #stop-btn {
  background: #8b1a1a;
  display: none;
  }
  #stop-btn:hover { background: #b22222; }
  #stop-btn.visible { display: inline-block; }
  label {
  display: block;
  margin-bottom: 8px;
  color: #4ec9b0;
  font-weight: 500;
  }
  </style>
</head>
<body>
  <div class="container">
  <h1>Nari Interpreter</h1>

  <div id="status" class="status loading">Loading interpreter...</div>

  <div class="panel">
  <label for="code-input">Nari Code:</label>
  <textarea id="code-input" placeholder='print("Hello from Nari in the browser!");'>print("Hello from Nari in the browser!");</textarea>
  <div style="margin-top: 10px;">
  <button id="run-btn"  onclick="runCode()"  disabled>Run Code</button>
  <button id="stop-btn" onclick="stopCode()">Stop</button>
  <button onclick="clearOutput()">Clear Output</button>
  </div>
  </div>

  <div class="panel">
  <label>Output:</label>
  <pre id="output">Waiting for interpreter to load...</pre>
  </div>
  </div>

  <script>
  const outputElem = document.getElementById('output');
  const statusElem = document.getElementById('status');
  const runBtn  = document.getElementById('run-btn');
  const stopBtn  = document.getElementById('stop-btn');

  // URL of the emscripten JS glue, resolved relative to this page.
  const interpreterJsUrl = new URL('nari.js', location.href).href;

  // Main-page Module: loads the wasm silently just to show "Interpreter ready".
  // All user code execution happens in a separate Worker so the main thread
  // stays responsive and long-running programs can be cancelled.
  var Module = {
  noInitialRun: true,
  print:  function() {},
  printErr: function() {},
  onRuntimeInitialized: function() {
  updateStatus('Interpreter ready!', 'ready');
  runBtn.disabled = false;
  clearOutput();
  outputElem.textContent = 'Nari interpreter loaded.\nReady to run code.\n';
  },
  onAbort: function(what) {
  updateStatus('Failed to load interpreter', 'error');
  outputElem.textContent = 'Failed to load: ' + what + '\n';
  }
  };

  function updateStatus(message, type) {
  statusElem.textContent = message;
  statusElem.className  = 'status ' + type;
  }

  function appendOutput(text) {
  outputElem.textContent += text;
  outputElem.scrollTop = outputElem.scrollHeight;
  }

  function clearOutput() {
  outputElem.textContent = '';
  }

  // worker management
  let activeWorker = null;

  // Inline Worker source. The main thread posts:
  //  { type: 'run', code, scriptUrl }
  // The worker replies with:
  //  { type: 'print'|'printErr', text }
  //  { type: 'done', exitCode }
  //  { type: 'error', message }
  const workerSource = `
self.onmessage = function(e) {
  if (e.data.type !== 'run') return;
  let code  = e.data.code;
  let scriptUrl = e.data.scriptUrl;

  // Assign to global scope BEFORE importScripts so Emscripten picks it up.
  self.Module = {
  noInitialRun: true,
  print: function(text) {
  if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
  self.postMessage({ type: 'print', text: text + '\\n' });
  },
  printErr: function(text) {
  if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
  self.postMessage({ type: 'printErr', text: text + '\\n' });
  },
  // Resolve .wasm relative to nari.js (not the blob worker URL).
  locateFile: function(path) {
  return new URL(path, scriptUrl).href;
  },
  onRuntimeInitialized: function() {
  try { Module.FS.mkdir('/tmp'); } catch(_) {}
  try {
  Module.FS.writeFile('/tmp/code.nari', code);
  let result = Module.callMain(['/tmp/code.nari']);
  self.postMessage({ type: 'done', exitCode: result || 0 });
  } catch(ex) {
  self.postMessage({ type: 'error', message: ex.message });
  }
  },
  onAbort: function(what) {
  self.postMessage({ type: 'error', message: 'Aborted: ' + what });
  }
  };

  importScripts(scriptUrl);
};
`;

  function runCode() {
  const code = document.getElementById('code-input').value;
  if (!code.trim()) { appendOutput('No code to run.\n'); return; }

  clearOutput();
  appendOutput('Running...\n\n');
  updateStatus('Running...', 'running');
  runBtn.disabled = true;
  stopBtn.classList.add('visible');

  const blob  = new Blob([workerSource], { type: 'application/javascript' });
  const blobUrl = URL.createObjectURL(blob);
  activeWorker  = new Worker(blobUrl);
  URL.revokeObjectURL(blobUrl);

  activeWorker.onmessage = function(e) {
  const msg = e.data;
  if (msg.type === 'print' || msg.type === 'printErr') {
  appendOutput(msg.text);
  } else if (msg.type === 'done') {
  if (msg.exitCode !== 0)
  appendOutput('\nProcess exited with code: ' + msg.exitCode + '\n');
  finishRun();
  } else if (msg.type === 'error') {
  appendOutput('\nError: ' + msg.message + '\n');
  finishRun();
  }
  };

  activeWorker.onerror = function(err) {
  appendOutput('\nWorker error: ' + err.message + '\n');
  finishRun();
  };

  activeWorker.postMessage({ type: 'run', code: code, scriptUrl: interpreterJsUrl });
  }

  function stopCode() {
  if (activeWorker) {
  activeWorker.terminate();
  activeWorker = null;
  appendOutput('\n[Execution stopped]\n');
  }
  finishRun();
  }

  function finishRun() {
  if (activeWorker) { activeWorker.terminate(); activeWorker = null; }
  runBtn.disabled = false;
  stopBtn.classList.remove('visible');
  updateStatus('Interpreter ready!', 'ready');
  }

  document.getElementById('code-input').addEventListener('keydown', function(e) {
  if (e.ctrlKey && e.key === 'Enter') runCode();
  });
  </script>

  <!-- Loads nari.js on the main thread for the initial "ready" signal only.
  Each user code run happens inside a fresh Worker; the main thread never blocks. -->
  {{{ SCRIPT }}}
</body>
</html>